CVE-2021-38383

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.2%
EPSS %ILE
67th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 10, 2021

Last Modified

February 13, 2026

Advisory Details (1)

Auto-updated Oct 1, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit 246d8ae0cef2 (owntone/owntone-server)

Patch available: owntone/owntone-server 28.2 (contains commit 246d8ae0cef2)

https://github.com/owntone/owntone-server/commit/246d8ae0cef27377e5dfe9ee3ad87e864d6b6266

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 181 total refreshes for this CVE.

  1. 2026-10-05 17:40 UTCEPSS rescore
  2. 2026-10-04 23:19 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
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  5. 2026-09-30 15:39 UTCEG score recompute
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  1. 2026-09-13 16:43 UTCEPSS rescore
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  9. 2026-09-06 11:30 UTCOSV refresh
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  27. 2026-08-19 22:04 UTCOSV refresh
  28. 2026-08-19 17:01 UTCEPSS rescore
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  44. 2026-08-04 15:06 UTCEPSS rescore
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  73. 2026-07-13 22:27 UTCEPSS rescore
  74. 2026-07-12 05:44 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2021-38383?
CVE-2021-38383 is a critical vulnerability published on August 10, 2021. OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.
When was CVE-2021-38383 disclosed?
CVE-2021-38383 was first published on August 10, 2021, with the most recent update on February 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-38383 actively exploited?
CVE-2021-38383 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (67th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-38383?
CVE-2021-38383 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-38383?
A fix for CVE-2021-38383 is available: update to the fixed version the vendor names in its advisory.

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